CN102685972A - Light emitting diode driving circuit and light emitting diode driving controller - Google Patents
Light emitting diode driving circuit and light emitting diode driving controller Download PDFInfo
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- CN102685972A CN102685972A CN2011103367894A CN201110336789A CN102685972A CN 102685972 A CN102685972 A CN 102685972A CN 2011103367894 A CN2011103367894 A CN 2011103367894A CN 201110336789 A CN201110336789 A CN 201110336789A CN 102685972 A CN102685972 A CN 102685972A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
- H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/375—Switched mode power supply [SMPS] using buck topology
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Abstract
A light emitting diode driving circuit and a light emitting diode driving controller are provided, the light emitting diode driving controller includes: a comparing unit, a switching control unit and a current correction unit. The light emitting diode driving circuit and the light emitting diode driving controller can adjust the fixed on/off time or the judgment quasi-position of the current peak/valley value according to the error between the actual current average value and the preset current value, so that the average current of the light emitting diode module is corrected to the preset current value to compensate any factor influence which can cause the average current offset.
Description
Technical field
The present invention relates to a kind of LED driving circuit and light-emitting diode driving governor.
Background technology
See also Fig. 1, be the circuit diagram of existing LED driving circuit.LED driving circuit comprises an inductance L, a transistor switch M1, a freewheel unit M2, a light-emitting diode (LED) module 20, a current sense resistor Ri and a controller 10.Controller 10 is with fixedly conducting and the shutoff of turn-off time oxide-semiconductor control transistors switch M1, and it is luminous that light-emitting diode (LED) module 20 is continued, and the detailed circuit running is illustrated in down.
Through above-mentioned control mode, the electric current of light-emitting diode (LED) module 20 can shake between a current peak and an electric current valley in theory.Yet,, and can difference just be arranged along with the voltage of input power supply Vin owing to the electric current valley can be looked the predetermined turn-off time and decide.This difference that can cause the average electrical of light-emitting diode (LED) module 20 to fail to be convened for lack of a quorum with input power supply Vin changes, and cause the brightness of light-emitting diode (LED) module 20, even colour temperature can change also.Moreover, because it is also big to have the error of inductance value of time delay, inductance L on the circuit operation, also can make the actual current peak value of light-emitting diode (LED) module 20 also can be different.
Prior art:
2: comparator
The 6:SR trigger
4: fixing turn-off time unit
10: controller
20: light-emitting diode (LED) module
Vr: reference signal
IFB: current detection signal
Vin: input power supply
S: set end
Q ': reversed-phase output
Q: output
R: the end of resetting
L: inductance
M1: transistor switch
M2: freewheel unit
Ri: current sense resistor
The present invention:
100,200,300: the light-emitting diode driving governor
102,202: comparing unit
104: fixing turn-off time unit
106,206,306:SR trigger
108,208,308: the electric current amending unit
120,220,320: light-emitting diode (LED) module
204: fixing ON time unit
301: comparator
302: sluggish comparing unit
303: integral unit
304: inverter
305: diverter switch
L: inductance
SW: diverter switch
D: freewheel unit
Vin: input power supply
Ri: current sense resistor
IFB: current detection signal
Vr: reference signal
S: set end
Q ': reversed-phase output
Q: output
R: the end of resetting
Ic: electric current corrected signal
I1: first current source
I2: second current source
Vr ': base reference signal
Summary of the invention
When being applied to the driving of light-emitting diode in view of the controller of fixedly turn-off time pattern of the prior art; Average current value can change with factors such as input voltage, inductance value errors; LED driving circuit of the present invention and light-emitting diode driving governor can be according to fixedly accurate of the judgements of conducting/turn-off time or current peak/valley of the error between actual current mean value and predetermined current value adjustment; The average current correction that makes light-emitting diode (LED) module is to predetermined current value, to compensate any factor affecting that possibly cause average current offset.
For reaching above-mentioned purpose, a kind of LED driving circuit comprises a light-emitting diode (LED) module, an inductance, a freewheel unit, a switching switch and a light-emitting diode driving governor.One end of inductance and an end of light-emitting diode (LED) module couple.Freewheel unit couples light-emitting diode (LED) module and inductance to form a current circuit.Whether diverter switch couples light-emitting diode (LED) module, provide to light-emitting diode with the electric power of controlling an input power supply.The light-emitting diode driving governor; A current detection signal that receives electric current represent light-emitting diode (LED) module is with periodicity control its switch conducting in view of the above or turn-off a predetermined period of time; Wherein predetermined period of time is adjusted with current detection signal, makes the mean value of the electric current of light-emitting diode (LED) module be stable at a predetermined current value.
The present invention provides a kind of light-emitting diode driving governor simultaneously, provides a power drives one light-emitting diode (LED) module in order to control a suitching type change-over circuit.The light-emitting diode driving governor comprises a comparing unit, and switches a control unit and an electric current amending unit.Comparing unit produces a compare result signal according to a current detection signal of the size of current of representing light-emitting diode (LED) module.Switch control unit produces a switching control signal according to a compare result signal and a predetermined period of time, switches switch in order to one of conducting or shutoff suitching type change-over circuit.The electric current amending unit produces an electric current corrected signal with the adjustment predetermined period of time according to current detection signal, makes the mean value of the electric current of light-emitting diode (LED) module be stable at a predetermined current value.
The present invention also provides another kind of light-emitting diode driving governor a kind of light-emitting diode driving governor, provides a power drives one light-emitting diode (LED) module in order to control a suitching type change-over circuit.The light-emitting diode driving governor comprises a sluggish comparing unit, and switches a control unit and an electric current amending unit.The electric current amending unit produces at least one reference signal according to current detection signal.Sluggish comparing unit produces a compare result signal according to a current detection signal and at least one reference signal of the size of current of representing light-emitting diode (LED) module.Switch control unit produces one according to compare result signal and switches control signal, switches switch in order to one of conducting or shutoff suitching type change-over circuit.
Above general introduction and ensuing detailed description are all exemplary in nature, are in order to further specify claim of the present invention.And about other purposes of the present invention and advantage, will set forth in follow-up explanation and accompanying drawing.
Description of drawings
Fig. 1 is the circuit diagram of existing LED driving circuit.
Fig. 2 is the circuit diagram according to the LED driving circuit of one first preferred embodiment of the present invention.
Fig. 3 is the circuit diagram according to the LED driving circuit of one second preferred embodiment of the present invention.
Fig. 4 is the circuit diagram according to the LED driving circuit of one the 3rd preferred embodiment of the present invention.
Reference numeral:
Embodiment
See also Fig. 2, be circuit diagram according to the LED driving circuit of one first preferred embodiment of the present invention.LED driving circuit comprises a suitching type change-over circuit and a light-emitting diode driving governor 100, and light-emitting diode driving governor 100 control suitching type change-over circuits provide a power drives one light-emitting diode (LED) module 120.The suitching type change-over circuit comprises an inductance L, and switches a switch SW and a freewheel unit D.One end of inductance L couples an input power supply Vin, and the anode of the other end and light-emitting diode (LED) module 120 couples.The negative terminal of light-emitting diode (LED) module 120 couples the end of diverter switch SW, and the other end ground connection of diverter switch SW.The anode of freewheel unit D couples the negative terminal of light-emitting diode (LED) module 120, and its negative terminal couples input power supply Vin, so that the electric current afterflow path of inductance L to be provided.
At present embodiment; Light-emitting diode driving governor 100 is a fixing turn-off time controller; Comprise a comparing unit 102, and switch a control unit and an electric current amending unit 108, and switch control unit comprises fixedly turn-off time unit 104 of a set-reset flip-floop 106 and.One current sense resistor Ri couples diverter switch SW, when diverter switch SW conducting, produces a current detection signal IFB of the size of current of representing light-emitting diode (LED) module 120.Comparing unit 102 produces a compare result signal according to a current detection signal IFB and a reference signal Vr.The setting end S of set-reset flip-floop 106 couples the output of comparing unit 102, reset end R and output Q and couple fixedly turn-off time unit 104, and reversed-phase output Q ' couples the control end of diverter switch SW.At the beginning of each cycle, light-emitting diode driving governor 100 conducting diverter switch SW make the electric current of input power supply Vin arrive ground through inductance L, light-emitting diode (LED) module 120, diverter switch SW and current sense resistor Ri.At this moment, the inductance L electric current continues to rise.When the standard position of electric current rising causes current detection signal IFB is higher than the accurate position of reference signal Vr; Comparing unit 102 produces high levle signal a to set-reset flip-floop 106, and set-reset flip-floop 106 shutoff diverter switch SW and triggering are fixedly picked up counting turn-off time unit 104.Fixedly turn-off time unit 104 produces a pulse signal behind timing one predetermined period of time, to reset set-reset flip-floop 106, make diverter switch SW again conducting to get into next cycle.Predetermined period of time can cooperate the environment set of side circuit, and suitably sets predetermined period of time, can make diverter switch SW turn off process, and the electric current of inductance L still all maintains on the zero current, and makes inductance L operate in the continuous current pattern.
Electric current amending unit 108 is according to current detection signal IFB; With the mean value of judgement electric current and the difference of predetermined current value; And produce an electric current corrected signal Ic in view of the above to adjust the fixedly length of the predetermined period of time of turn-off time unit 104, make the mean value of the electric current of light-emitting diode (LED) module 120 be stable at a predetermined current value.The current sense resistor Ri of present embodiment only when diverter switch SW conducting, can detect electric current.So the electric current amending unit 108 of present embodiment couples comparing unit 102 and set-reset flip-floop 106 simultaneously to judge the conducting sequential of diverter switch SW; And when diverter switch SW conducting; According to current detection signal IFB and represent the reference signal Vr of predetermined current value to judge whether the mean value of electric current and predetermined current value be variant, if then adjust the length of predetermined period of time.For example: when current average was higher than predetermined current value, electric current amending unit 108 transferred long predetermined period of time to equal predetermined current value until current average; When current average was lower than predetermined current value, electric current amending unit 108 transferred short predetermined period of time to equal predetermined current value until current average.So, LED driving circuit of the present invention can reach full voltage input (90-264V) and compensation assembly error or circuit delay etc., makes the current average of light-emitting diode (LED) module be stable at predetermined current value.
Present embodiment is to decide the mode of turn-off time length to carry out the control of diverter switch with the detection peak electric current and according to the average current size, but can guarantee that so led current is in opereating specification and then the useful life of guaranteeing light-emitting diode.Certainly, the present invention also can detect valley point current and decide the mode of ON time length to carry out the control of diverter switch according to the average current size, sees also the explanation of following examples.
See also Fig. 3, be circuit diagram according to the LED driving circuit of one second preferred embodiment of the present invention.LED driving circuit comprises a suitching type change-over circuit and a light-emitting diode driving governor 200, and light-emitting diode driving governor 200 control suitching type change-over circuits provide a power drives one light-emitting diode (LED) module 220.The suitching type change-over circuit comprises an inductance L, and switches a switch SW and a freewheel unit D.The end of diverter switch SW couples an input power supply Vin, and an end of the other end and inductance L couples.The other end of inductance L couples the anode of light-emitting diode (LED) module 220, and the negative terminal of light-emitting diode (LED) module 220 couples the anode of ground and freewheel unit D through a current sense resistor Ri.The negative terminal of freewheel unit D couples the tie point of inductance L and diverter switch SW, so that the electric current afterflow path of inductance L to be provided.
At present embodiment; Light-emitting diode driving governor 200 is a fixing ON time controller; Comprise a comparing unit 202, and switch a control unit and an electric current amending unit 208, and switch control unit comprises fixedly ON time unit 204 of a set-reset flip-floop 206 and.Compare with Fig. 2 embodiment; No matter the current sense resistor Ri diverter switch SW conducting of present embodiment or shutoff all can detect the electric current of the light-emitting diode (LED) module 220 of flowing through, so light-emitting diode driving governor 200 can be judged the average current size of light-emitting diode (LED) module 220 more accurately.Comparing unit 202 produces a compare result signal according to a current detection signal IFB and a reference signal Vr that current sense resistor Ri is produced.The setting end S of set-reset flip-floop 206 couples the output of comparing unit 202, and output Q couples the fixedly control end of ON time unit 204 and diverter switch SW, and the end R that resets couples the fixedly output of ON time unit 204.At the beginning of each cycle, the low excessively comparing unit 202 that causes of the electric current of light-emitting diode (LED) module 220 produces the high levle signal.At this moment, set-reset flip-floop 206 produces the high levle signal with conducting diverter switch SW in output Q, the electric current that makes input power supply Vin through diverter switch SW, inductance L, light-emitting diode (LED) module 220, and current sense resistor Ri to ground, this moment, the inductance L electric current continued to rise.Fixedly ON time unit 204 picks up counting after receiving the high levle signal of set-reset flip-floop 206 simultaneously.Fixedly ON time unit 204 produces a pulse signal behind timing one predetermined period of time, to reset set-reset flip-floop 206.Set-reset flip-floop 206 turn-offs diverter switch SW at this moment, and inductance L is through freewheel unit D afterflow, and this moment, electric current began to descend.When electric current is low excessively when causing comparing unit 202 to produce the high levle signals, diverter switch SW conducting and get into next cycle again.Because the electric current of inductance L all maintains on (reference signal Vr representative) electric current valley, so inductance L operates in the continuous current pattern.
In the present embodiment; Electric current amending unit 208 is an error amplifier; Received current detection signal IFB and reference signal Vr; With the mean value of judgement electric current and the difference of predetermined current value, and produce an electric current corrected signal Ic in view of the above to adjust the fixedly length of the predetermined period of time of ON time unit 204.When current average was higher than predetermined current value, electric current amending unit 208 transferred short predetermined period of time to equal predetermined current value until current average; When current average was lower than predetermined current value, electric current amending unit 208 transferred long predetermined period of time to equal predetermined current value until current average.So, but any factor that influences electric current of dynamic compensation, and make the mean value of the electric current of light-emitting diode (LED) module 220 be stable at a predetermined current value.
Above-mentioned two embodiment have explained that the present invention is applied to the circuit execution mode of fixedly turn-off time control (detecting the peak value of electric current) and fixedly ON time control (detecting the valley of electric current).In fact, the present invention also can be applied to the LED driving circuit of ripple control model (Ripple Mode), with peak value that detects electric current and shutoff and the conducting that valley comes control its switch.See also Fig. 4, be circuit diagram according to the LED driving circuit of one the 3rd preferred embodiment of the present invention.LED driving circuit comprises a suitching type change-over circuit and a light-emitting diode driving governor 300, and light-emitting diode driving governor 300 control suitching type change-over circuits provide a power drives one light-emitting diode (LED) module 320.The suitching type change-over circuit comprises an inductance L, and switches a switch SW and a freewheel unit D.The end of diverter switch SW couples an input power supply Vin, and the other end couples the anode of light-emitting diode (LED) module 320.The negative terminal of light-emitting diode (LED) module 320 couples an end of inductance L, and the other end of inductance L couples the anode of freewheel unit D, so that the electric current afterflow path of inductance L to be provided through freewheel unit D.One current sense resistor Ri also couples the other end and the ground connection of inductance L, to produce a current detection signal IFB who represents light-emitting diode (LED) module 320 size of current.
Light-emitting diode driving governor 300 comprises a sluggish comparing unit 302, and switches a control unit and an electric current amending unit 308, and switch control unit comprises a set-reset flip-floop 306 and an inverter 304.Electric current amending unit 308 produces a reference signal Vr according to current detection signal IFB.Sluggish comparing unit 302 produces a compare result signal according to current detection signal IFB and reference signal Vr.Electric current amending unit 308 also can produce two reference signals as the accurate position of the more required reference of sluggishness according to different sluggish comparing unit 302 demands.In the present embodiment, sluggish comparing unit 302 can according to reference signal Vr and in the sluggish scope of establishing decide sluggish relatively last reference position value and under reference position value.So, the electric current of inductance L is maintained on the zero current, promptly operate in the continuous current pattern.But the electric current amending unit 308 use error amplifiers of present embodiment are realized, implement circuit and introduce another kind at this, realize with integral way judgement current average, and this circuit also can be applicable to the foregoing description to replace error amplifier.
Electric current amending unit 308 comprises a comparator 301, a charhing unit, a discharge cell and an integral unit 303, to produce a reference signal Vr.Integral unit 303 can be electric capacity or circuit with integral action.Charhing unit has one first current source I1.The first current source I1 couples integral unit 303 and so that a basic charging current to be provided integral unit 303 is charged.Discharge cell has one second current source I2 and a switching switch 305, the second current source I2 couple integral unit 303 through diverter switch 305, so that a discharging current to be provided integral unit 303 is discharged.Wherein, the size of current of the first current source I1 is less than the size of current of the second current source I2.The end of oppisite phase of comparator 301 receives a base reference signal Vr ', and non-oppisite phase end received current detection signal IFB is with the conducting and the shutoff of control its switch 305 in view of the above.When the standard position of current detection signal IFB was lower than the accurate position of base reference signal Vr ', comparator 301 output low level signals were to turn-off diverter switch 305.This moment, the first current source I1 was to the voltage of integral unit 303 chargings with raising integral unit 303.When the standard position of current detection signal IFB is higher than the accurate position of base reference signal Vr '; Comparator 301 output high levle signals are with conducting diverter switch 305; Make the second current source I2 to integral unit 303 discharges, and the first current source I1 is simultaneously to integral unit 303 chargings.Because and the electric current of the first current source I1 is less than the electric current of the second current source I2, the voltage of integral unit 303 will reduce this moment.So; When the mean value of current detection signal IFB is higher than base reference signal Vr '; Electric current amending unit 308 will be turned down the accurate position of reference signal Vr; And when the mean value of current detection signal IFB is lower than base reference signal Vr ', electric current amending unit 308 will be heightened the accurate position of reference signal Vr.Sluggish comparing unit 302 received current detection signal IFB and reference signal Vr, and produce a compare result signal.The setting end S of set-reset flip-floop 306 couples the output of sluggish comparing unit 302, and the end R that resets couples the output of sluggish comparing unit 302 through inverter 304.Output Q couples the control end of diverter switch SW.At the beginning of each cycle, the electric current of light-emitting diode (LED) module 320 is low excessively to cause sluggish comparing unit 302 to produce the high levle signal.At this moment, set-reset flip-floop 306 produces the high levle signal with conducting diverter switch SW in output Q, makes the electric current of input power supply Vin arrive ground through diverter switch SW, light-emitting diode (LED) module 320, inductance L and current sense resistor Ri, and this moment, the inductance L electric current continued to rise.When raising, the electric current of light-emitting diode (LED) module 320 cause sluggish comparing unit 302 to produce the low level signals.At this moment, set-reset flip-floop 306 turn-offs diverter switch SW, and inductance L is through freewheel unit D afterflow, and electric current begins to descend.When electric current is low excessively when causing sluggish comparing unit 302 to produce the high levle signals, set-reset flip-floop 306 conducting diverter switches again SW and get into next cycle.
The present invention discloses with preferred embodiment hereinbefore, and the those of ordinary skill in right affiliated field it should be understood that this embodiment only is used to describe the present invention, and should not be read as restriction scope of the present invention.It should be noted,, all should be made as and be covered by in the category of the present invention such as with the variation and the displacement of this embodiment equivalence.Therefore, protection scope of the present invention when with claim the person of being defined be as the criterion.
Claims (10)
1. a light-emitting diode driving governor provides a power drives one light-emitting diode (LED) module in order to control a suitching type change-over circuit, and this light-emitting diode driving governor comprises:
One comparing unit, the current detection signal according to the size of current of representing this light-emitting diode (LED) module produces a compare result signal;
One switches control unit, produces one according to this compare result signal and a predetermined period of time and switches control signal, in order to conducting or turn-off one of this suitching type change-over circuit and switch switch; And
One electric current amending unit produces an electric current corrected signal to adjust this predetermined period of time according to this current detection signal, makes the mean value of the electric current of this light-emitting diode (LED) module be stable at a predetermined current value.
2. light-emitting diode driving governor according to claim 1; Wherein this switch control unit comprises a set time generation unit, and producing set time signal represent this predetermined period of time and generation sequential that should the set time signal is to decide according to this compare result signal.
3. light-emitting diode driving governor according to claim 2; Wherein this electric current amending unit comprises an error amplifier; This error amplifier produces an error amplification signal according to this current detection signal and a reference signal, and this set time generation unit is according to this this predetermined period of time of error amplification signal adjustment.
4. light-emitting diode driving governor according to claim 1, wherein this electric current amending unit comprises an integral unit, to carry out integration according to this current detection signal to produce this electric current corrected signal.
5. a light-emitting diode driving governor provides a power drives one light-emitting diode (LED) module in order to control a suitching type change-over circuit, and this light-emitting diode driving governor comprises:
One electric current amending unit produces an at least one reference signal according to a current detection signal of the size of current of representing this light-emitting diode (LED) module;
One sluggish comparing unit, this current detection signal and this at least one reference signal according to the size of current of representing this light-emitting diode (LED) module produce a compare result signal; And
One switches control unit, produces one according to this compare result signal and switches control signal, in order to conducting or turn-off one of this suitching type change-over circuit and switch switch.
6. light-emitting diode driving governor according to claim 5, wherein this electric current amending unit comprises an error amplifier, and this error amplifier produces this at least one reference signal according to this current detection signal and a current reference signal.
7. light-emitting diode driving governor according to claim 5, wherein this electric current amending unit comprises an integral unit, to carry out integration to produce this at least one reference signal according to this current detection signal and a current reference signal.
8. LED driving circuit comprises:
One light-emitting diode (LED) module;
One inductance, an end of an end and this light-emitting diode (LED) module couples;
One freewheel unit couples this light-emitting diode (LED) module and this inductance to form a current circuit;
Whether one switches switch, couples this light-emitting diode (LED) module, provide to this light-emitting diode (LED) module with the electric power of controlling an input power supply; And
One light-emitting diode driving governor; A current detection signal that receives the electric current of representing this light-emitting diode (LED) module is periodically to control this diverter switch conducting or to turn-off a predetermined period of time in view of the above; Wherein this predetermined period of time makes the mean value of the electric current of this light-emitting diode (LED) module be stable at a predetermined current value with this current detection signal adjustment.
9. LED driving circuit according to claim 8, wherein this light-emitting diode driving governor is a fixing fixing ON time controller of turn-off time controller or.
10. LED driving circuit according to claim 8, wherein this inductance operates in the continuous current pattern.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW100109227 | 2011-03-17 | ||
| TW100109227A TWI465148B (en) | 2011-03-17 | 2011-03-17 | Led driving circuit and led driving controller |
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| Publication Number | Publication Date |
|---|---|
| CN102685972A true CN102685972A (en) | 2012-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103367894A Pending CN102685972A (en) | 2011-03-17 | 2011-10-31 | Light emitting diode driving circuit and light emitting diode driving controller |
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|---|---|
| US (1) | US9288853B2 (en) |
| CN (1) | CN102685972A (en) |
| TW (1) | TWI465148B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103561517A (en) * | 2013-11-06 | 2014-02-05 | 青岛海信电器股份有限公司 | Execution circuit, multi-path LED light string control circuit and control method |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI434164B (en) * | 2011-03-08 | 2014-04-11 | Green Solution Tech Co Ltd | Converting controller |
| JP6252231B2 (en) * | 2014-02-21 | 2017-12-27 | サンケン電気株式会社 | LED lighting device |
| KR20170071307A (en) * | 2015-12-15 | 2017-06-23 | 엘지이노텍 주식회사 | Power apparatus and method for controlling output current of the same |
| US10160342B2 (en) * | 2016-03-29 | 2018-12-25 | GM Global Technology Operations LLC | Dynamic adjustment of battery current limits based on usage |
| TWI654826B (en) | 2017-11-10 | 2019-03-21 | 國立成功大學 | Led driver and controlling method thereof |
| TWI683598B (en) * | 2019-04-17 | 2020-01-21 | 宏碁股份有限公司 | Light-emitting module and light-emitting diode driving circuit |
| TWI727868B (en) * | 2020-07-24 | 2021-05-11 | 聚積科技股份有限公司 | Dimming device and dimming system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1623269A (en) * | 2002-01-29 | 2005-06-01 | 英特赛尔美国股份有限公司 | Synthetic ripple regulator |
| CN1964587A (en) * | 2005-11-11 | 2007-05-16 | 崇贸科技股份有限公司 | A control system and device for switching type illuminant unit |
| CN101155446A (en) * | 2006-09-29 | 2008-04-02 | 凹凸科技（中国）有限公司 | Illuminating system based on light emitting diode and its driving circuit and method |
| CN101621876A (en) * | 2008-07-02 | 2010-01-06 | 联阳半导体股份有限公司 | Luminous element drive circuit and method thereof |
| WO2010118944A1 (en) * | 2009-04-14 | 2010-10-21 | Tridonic Gmbh & Co Kg | Power regulation of led by means of an average value the led current and bidirectional counter |
| US20110037414A1 (en) * | 2009-08-14 | 2011-02-17 | Nanjing University Of Aeronautics And Astronautics | Driving apparatus for light emitting diodes |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4060840B2 (en) | 2004-10-01 | 2008-03-12 | 松下電器産業株式会社 | Light emitting diode driving semiconductor circuit and light emitting diode driving device having the same |
| US7538534B2 (en) | 2004-11-29 | 2009-05-26 | Supentex, Inc. | Method and apparatus for controlling output current of a cascaded DC/DC converter |
| US7323828B2 (en) * | 2005-04-25 | 2008-01-29 | Catalyst Semiconductor, Inc. | LED current bias control using a step down regulator |
| US7259525B2 (en) * | 2005-11-03 | 2007-08-21 | System General Corporation | High efficiency switching LED driver |
| JP2008160933A (en) * | 2006-12-21 | 2008-07-10 | Sharp Corp | Chopper regulator circuit |
| EP2213144A1 (en) * | 2007-10-26 | 2010-08-04 | Lighting Science Group Corporation | High efficiency light source with integrated ballast |
| US7863836B2 (en) | 2008-06-09 | 2011-01-04 | Supertex, Inc. | Control circuit and method for regulating average inductor current in a switching converter |
| US7928670B2 (en) | 2008-06-30 | 2011-04-19 | Iwatt Inc. | LED driver with multiple feedback loops |
| US8228001B2 (en) | 2009-02-24 | 2012-07-24 | Suntec Enterprises | Method and apparatus of driving LED and OLED devices |
| JP5601020B2 (en) * | 2010-05-19 | 2014-10-08 | ソニー株式会社 | Light emitting element driving device and display device |
| CN102014548B (en) * | 2010-09-07 | 2011-12-14 | 凹凸电子（武汉）有限公司 | Controller and method for adjusting brightness of light source as well as lighting system |
-
2011
- 2011-03-17 TW TW100109227A patent/TWI465148B/en not_active IP Right Cessation
- 2011-10-31 CN CN2011103367894A patent/CN102685972A/en active Pending
-
2012
- 2012-01-20 US US13/354,343 patent/US9288853B2/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1623269A (en) * | 2002-01-29 | 2005-06-01 | 英特赛尔美国股份有限公司 | Synthetic ripple regulator |
| CN1964587A (en) * | 2005-11-11 | 2007-05-16 | 崇贸科技股份有限公司 | A control system and device for switching type illuminant unit |
| CN101155446A (en) * | 2006-09-29 | 2008-04-02 | 凹凸科技（中国）有限公司 | Illuminating system based on light emitting diode and its driving circuit and method |
| CN101621876A (en) * | 2008-07-02 | 2010-01-06 | 联阳半导体股份有限公司 | Luminous element drive circuit and method thereof |
| WO2010118944A1 (en) * | 2009-04-14 | 2010-10-21 | Tridonic Gmbh & Co Kg | Power regulation of led by means of an average value the led current and bidirectional counter |
| US20110037414A1 (en) * | 2009-08-14 | 2011-02-17 | Nanjing University Of Aeronautics And Astronautics | Driving apparatus for light emitting diodes |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103561517A (en) * | 2013-11-06 | 2014-02-05 | 青岛海信电器股份有限公司 | Execution circuit, multi-path LED light string control circuit and control method |
| CN103561517B (en) * | 2013-11-06 | 2015-12-30 | 青岛海信电器股份有限公司 | Executive circuit, multi-way LED lamp cascade control circuit and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| US9288853B2 (en) | 2016-03-15 |
| US20120235570A1 (en) | 2012-09-20 |
| TWI465148B (en) | 2014-12-11 |
| TW201240512A (en) | 2012-10-01 |
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Application publication date: 20120919 |